Driving gear for snowplows



G. D. TOY ET AL DRIVING GEAR FOR SNOWPLOWS Nov. 13 1923.

Filed Aug. 28. 1.922 2 Sheets-Sheet 1 Nov. 13 11923.

G.D.TOY ETAL DRIVING GEAR FOR SNOWPLOWS Filed Aug. 28, 1922 2Sheets-Sheet Z INVE ToRs A 1 If a ATTORNEY.

Patented Nov. 13, i923.

aste GEORGE D. TOY AND HUGH T. TOY, OF SIDNEY, OHIO.

nmvnte GEAR ronsnowruows.

Application filed August 28, 1922. Serial No. 584,930.

To all whom it may concern Be it known that we, GEORGE D. ToY and HUGHT. ToY, citizens of the United States, residing at Sidney, in the countof Shelby and State of Ohio, have jointy invented new and usefulImprovements in Driving Gears for Snowplows, of which the following is aspecification- Our invention relates to driving gear whereby a snow plowmay be coupled to a tractor and driven, affording the plow the utmostproper freedom of movement while giving the tractor driver completecontrol of the plow and tractor.-

A better appreciation of the objects and advantages of our inventionwill be obtainable after its construction and operation have beendescribed, so we shall proceed at once with the description, referringto the accompanying drawings, in which Figure 1 is a perspective view ofa plow attached to a tractor by our device, the tractor being shown withdotted lines;

Figure 2 is a perspective view of the low detached from the tractor andseen rom the rear;

Figure 3 is a front view of the plow and tractor, showing the means forguiding the up and down'movements of the plow and preventing lateralmovement of the plow with reference to the tractor;

Figures 4 and 5. show the apparatus in action, indicating the greatflexibility of the device.

As we are making no claims here to the plow structure, it is notnecessary to describe the low in detail. It sufiices to say that the pow is provided with a runner 10 at its apex, and two runners 11 at therear, which slide on the snow or the gr o'und and carry the plow in alevel osition with its lower edge raised slightly a ove the ground.Pivotally attached at 1212 of the plow frame are driving bars 13, therebeing a pairof these bars at each side, thefree ends of each pair ofbars being pivotally connected to a oke 14, each yoke having atits'center a hole 15. We prefer to attach these yokes to the tractor bybolts 16, whose driving wheels of the tractor.

axes coincide with the axes of the rear For the purpose of carrying thebolts 16 .we bolt members 17 to the journal boxes not shown). Secured tothe frame of the p ow are rubbing plates or guides, 20, and to thetractor we attach a bar 21, whose length is but; slightly less than thedistance between the plates 20. The purpose of these plates and the baris to prevent lateral movement of the plow, with reference to thetractor, while leaving the plow complete freedom of movement up anddown. The bar 21 is secured to the tractor frame by plates 22 and bolts,as is clearly seen in Figure 3. In Figure 2 the bar and plates are shownwith dotted lines, showing the relative position of the bar and guideplates 20.

By reference to Figures 1, 3, 4 and 5, various phases of the operationof our driving device will be readily understood. On level ground thedriving bars are substantially horizontal. Figure 4 shows the plow beingdriven over a curb, and Figure 5 shows the plow on the ground behind thecurb, on a level higher than the street on which the tractor stands.These two figures show how the yoke aocomodates itself to the positionof the plow, always equalizing the pushing ressure on the driving bars.The driving ars are always parallel to each other and usually parallelto the ground. The guides, plates 20 and bar 21, being located at aboutthe center of the plow, are enabled to guide the plow and prevent itsdisplacement laterally, while sustaining the minimum of strain. The bar21 may be kept in place on the tractor, at least throughout the winter,and all that is necessary to attach the plow, or detach it, is to put inor remove the two screws 16.

While we have disclosed the preferred embodiment of our invention we donot limit ourselves to the particular structure shown, as the structureis susceptible to modifications while remaining within the scope of ourinvention. What we claim as our invention and desire to protect byLetters Patent is s follows:

1. Driving gear for a snow plow, comprising driving bars pivotallyconnected to the plow and to a tractor, and rubbing lates on the plowadapted to bear against a utments on the tractor, whereby to preventlateral displacement of the plow while permitting free movement of theplow up and down with reference to the tractor, said bars constitutingthe sole driving connection between the plow and tractor.

2. Driving gear for a snow plow, comprising a pair of driving barspivotally connected to each side of the plow, the free ends of each pairof bars belng pivotally conof said equalizer bars being pivotallyconnected to each side of a tractor, and rubbing plates on the plowadapted to bear against abutments on the tractor, whereby to preventlateral displacement of the plow with reference to the tractor, whilepermitting the plow freedom of movement with reference to the tractor inother respects.

4.- Drivin gear for a snow plow, comprising a pair of driving barspivotally connected to each side of the plow, one bar above the other,and a. yoke uniting the free ends of said bars by pivotal connections,thereby permitting free movement of the bars either up or down withreference to the tractor while maintaining the parallelism of the links;and means for pivotally attaching said yoke to a tractor, the pivotalconnection bein midway between the driving 'bars.

5. riving gear for a snow plow, com prising a pair of driving barspivotally connected to each side of the plow, one bar above the other,and a yoke uniting the free ends of said bars b pivotal connections,thereby permitting i i-cc movement of the bars either up or down withreference to the tractor while maintaining the parallelism of the links;and means for pivotally attaching said yokes' to a tractor with the axesof said connections substantially coincident with that of the tractorwheels.

6. Drivin gear for V a snow plow, comprising a pair of driving barspivotally connected to each side of the plow,-one above the other and ayoke uniting the free ends of said bars by pivotal connections, therebypermitting free movement of thebars either up or down with reference tothe tractor while maintaining the parallelism of the links; means forpivotally attaching said are substantially parallel, one

yoke to a tractor, and a guide whereby latrubbing plates on the plowadapted to cooperate with abutments on the tractor to prevent lateraldisplacement of the plow while permitting freedom of movement of theplow with reference to the tractor in other directions.

8. Driving gear for a snow plow, comprising driving bars pivotallyconnected to the plow and tea tractor,- said bars being the sole drivingconnection between the tractor and low, and means comprising a membercarried by the tractor, but remote from said pivotal connection, forpreventing lateral movement of the plow with reference to the tractor,while allowing it full freedom of movement in other directlons.

- 9. Driving gear for a snow plow, comprising driving bars pivotallyconnected to the plow and to a tractor, said pivotal connections beingso located, relatively, that when the tractor and plow are on the samelevel the bars will 'be substantially horizontal, the plow being locatedin front of the tractor while the bars are connected to the tractor nearits. rear end, thereby insuring that the bars shall be of suflicient lenh to deviate but little from horizontality alt ough the ground overwhich the plow is pushed be unlevel, and rubbing plates on the plowadapted to cooperate w1th abutments on the tractor to prevent lateraldisplacement of the plow while permitting entire freedom of movement ofthe plow with reference to the tractor in other directions.

GEORGE D. TOY.

HUGH T. TOY.

